注意点：对springboot版本要求2.0以下；本次用的是 1.5.6.RELEASE；否则会报错

一、创建项目

1、用idea创建项目

点击finish，创建完成

2、添加依赖

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><groupId>com.luonan</groupId><artifactId>springboot-mybatis-demo</artifactId><version>0.0.1-SNAPSHOT</version><packaging>jar</packaging><name>springboot-mybatis-demo</name><description>Demo project for Spring Boot</description><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>1.5.6.RELEASE</version> <!-- 本次用的是  1.5.6.RELEASE；否则会报错 --><relativePath/> <!-- lookup parent from repository --></parent><properties><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding><project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding><java.version>1.8</java.version></properties><dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-jdbc</artifactId></dependency><dependency><groupId>org.mybatis.spring.boot</groupId><artifactId>mybatis-spring-boot-starter</artifactId><version>1.3.2</version></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-thymeleaf</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope></dependency><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><scope>runtime</scope></dependency><!-- alibaba的druid数据库连接池 --><dependency><groupId>com.alibaba</groupId><artifactId>druid</artifactId><version>1.0.11</version></dependency><!-- 分页插件 --><dependency><groupId>com.github.pagehelper</groupId><artifactId>pagehelper-spring-boot-starter</artifactId><version>1.1.2</version></dependency><!-- alibaba的druid数据库连接池 --><dependency><groupId>com.alibaba</groupId><artifactId>druid-spring-boot-starter</artifactId><version>1.1.0</version></dependency><!-- 读取project文件 --><dependency><groupId>net.sf.mpxj</groupId><artifactId>mpxj</artifactId><version>7.1.0</version></dependency></dependencies><build><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId></plugin><!-- mybatis generator 自动生成代码插件 --><plugin><groupId>org.mybatis.generator</groupId><artifactId>mybatis-generator-maven-plugin</artifactId><version>1.3.2</version><configuration><configurationFile>${basedir}/src/main/resources/generator/generatorConfig.xml</configurationFile><overwrite>true</overwrite><verbose>true</verbose></configuration></plugin></plugins></build></project>

3、整体项目结构

4、修改application.properties为application.yml

server:port: 8080
spring:datasource:name: test#mysql的信息注意更改url: jdbc:mysql://127.0.0.1:3306/t_test?useUnicode=true&characterEncoding=UTF-8&allowMultiQueries=trueusername: rootpassword: root# 使用druid数据源type: com.alibaba.druid.pool.DruidDataSourcedriver-class-name: com.mysql.jdbc.Driverfilters: statmaxActive: 20initialSize: 1maxWait: 60000minIdle: 1timeBetweenEvictionRunsMillis: 60000minEvictableIdleTimeMillis: 300000validationQuery: select 'x'testWhileIdle: truetestOnBorrow: falsetestOnReturn: falsepoolPreparedStatements: truemaxOpenPreparedStatements: 20mybatis:mapper-locations: classpath:mapping/*.xmltype-aliases-package: com.luonan.domain#pagehelper
pagehelper:helperDialect: mysqlreasonable: truesupportMethodsArguments: trueparams: count=countSql#控制台显示查询语句
logging:level:com:luonan:mapper: debug

5、generatorConfig.xml自动生成代码配置

<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE generatorConfigurationPUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN""http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd">
<generatorConfiguration><!-- 数据库驱动:选择你的本地硬盘上面的数据库驱动包--><classPathEntry  location="E:/Users/Administrator/.m2/mybatisdemo/mysql/mysql-connector-java/5.1.46/mysql-connector-java-5.1.46.jar"/><context id="DB2Tables"  targetRuntime="MyBatis3"><commentGenerator><property name="suppressDate" value="true"/><!-- 是否去除自动生成的注释 true：是 ： false:否 --><property name="suppressAllComments" value="true"/></commentGenerator><!--数据库链接URL，用户名、密码 --><jdbcConnection driverClass="com.mysql.jdbc.Driver" connectionURL="jdbc:mysql://127.0.0.1/t_test" userId="root" password="root"></jdbcConnection><javaTypeResolver><property name="forceBigDecimals" value="false"/></javaTypeResolver><!-- 生成模型/实体 的包名和位置--><javaModelGenerator targetPackage="com.luonan.domain" targetProject="src/main/java"><property name="enableSubPackages" value="true"/><property name="trimStrings" value="true"/></javaModelGenerator><!-- 生成映射文件的包名和位置--><sqlMapGenerator targetPackage="mapping" targetProject="src/main/resources"><property name="enableSubPackages" value="true"/></sqlMapGenerator><!-- 生成DAO的包名和位置--><javaClientGenerator type="XMLMAPPER" targetPackage="com.luonan.mapper" targetProject="src/main/java"><property name="enableSubPackages" value="true"/></javaClientGenerator><!-- 要生成的表 tableName是数据库中的表名或视图名 domainObjectName是实体类名--><table tableName="t_user" domainObjectName="User" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false"></table><table tableName="t_project" domainObjectName="Project" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false"></table><table tableName="t_role" domainObjectName="Role" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false"></table></context></generatorConfiguration>

6、添加mysql数据至数据库

首先分析这三张表的关系

在mysql里面新建一个 t_test 库

CREATE DATABASE t_test;

<1>t_user

SET FOREIGN_KEY_CHECKS=0;-- ----------------------------
-- Table structure for t_user
-- ----------------------------
DROP TABLE IF EXISTS `t_user`;
CREATE TABLE `t_user` (`id` varchar(255) NOT NULL,`user_name` varchar(255) DEFAULT NULL,`password` varchar(255) DEFAULT NULL,`phone` varchar(255) DEFAULT NULL,`role_id` varchar(255) DEFAULT NULL COMMENT '角色id',PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;-- ----------------------------
-- Records of t_user
-- ----------------------------
INSERT INTO `t_user` VALUES ('1', '张三', '123', '123123', '1');
INSERT INTO `t_user` VALUES ('2', '李四', '123', '11', '2');
INSERT INTO `t_user` VALUES ('3', '王五', '123', '111', '3');
INSERT INTO `t_user` VALUES ('4', '张三', '1', '1', '2');

<2>t_project

SET FOREIGN_KEY_CHECKS=0;-- ----------------------------
-- Table structure for t_project
-- ----------------------------
DROP TABLE IF EXISTS `t_project`;
CREATE TABLE `t_project` (`id` varchar(255) NOT NULL,`project_name` varchar(255) DEFAULT NULL COMMENT '项目名称',`user_id` varchar(255) DEFAULT NULL,`content` varchar(2000) DEFAULT NULL,PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;-- ----------------------------
-- Records of t_project
-- ----------------------------
INSERT INTO `t_project` VALUES ('1', '电影', '1', '红海行动');
INSERT INTO `t_project` VALUES ('2', '新时代 新气象', '1', '千万工程”造就万千美丽乡村');
INSERT INTO `t_project` VALUES ('3', '农业农村部', '1', '新一轮农业农村投资高潮或开启');
INSERT INTO `t_project` VALUES ('4', '农业中央纪委', '1', '集中整治“不吃公款吃老板”等不正之风部');
INSERT INTO `t_project` VALUES ('5', '今年养老金调整进入落地期', '1', '上海已出台调整方案');
INSERT INTO `t_project` VALUES ('6', '国产航母23日\"动一下\"', '2', '引全球关注 或完成关键测试');
INSERT INTO `t_project` VALUES ('7', '甘肃耗资16亿扶贫路假整改', '2', '巡视整改岂能蒙混过关？');

<3>t_role

SET FOREIGN_KEY_CHECKS=0;-- ----------------------------
-- Table structure for t_role
-- ----------------------------
DROP TABLE IF EXISTS `t_role`;
CREATE TABLE `t_role` (`id` varchar(255) DEFAULT NULL COMMENT '角色id',`name` varchar(255) DEFAULT NULL COMMENT '角色名称'
) ENGINE=InnoDB DEFAULT CHARSET=utf8;-- ----------------------------
-- Records of t_role
-- ----------------------------
INSERT INTO `t_role` VALUES ('1', '董事长');
INSERT INTO `t_role` VALUES ('2', '部门经理');
INSERT INTO `t_role` VALUES ('3', '员工');

7、设置自动生成mapper.xml

mybatis-generator:generate -e

运行后产生：

8、SpringbootMybatisDemoApplication

package com.luonan;import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;@SpringBootApplication
@MapperScan("com.luonan.mapper") //mapper的包的位置
public class SpringbootMybatisDemoApplication {public static void main(String[] args) {SpringApplication.run(SpringbootMybatisDemoApplication.class, args);}
}

9、UserMapper

<1>以下是正常通过generator生成的

a) userMapper.java

package com.luonan.mapper;import com.luonan.domain.User;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Param;import java.util.List;
import java.util.Map;public interface UserMapper {int deleteByPrimaryKey(String id);int insert(User record);int insertSelective(User record);User selectByPrimaryKey(String id);int updateByPrimaryKeySelective(User record);int updateByPrimaryKey(User record);
}

b) UserMapper.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
<mapper namespace="com.luonan.mapper.UserMapper" ><resultMap id="BaseResultMap" type="com.luonan.domain.User" ><id column="id" property="id" jdbcType="VARCHAR" /><result column="user_name" property="userName" jdbcType="VARCHAR" /><result column="password" property="password" jdbcType="VARCHAR" /><result column="phone" property="phone" jdbcType="VARCHAR" /><result column="role_id" property="roleId" jdbcType="VARCHAR" /></resultMap><sql id="Base_Column_List" >id, user_name, password, phone, role_id</sql><select id="selectByPrimaryKey" resultMap="BaseResultMap" parameterType="java.lang.String" >select <include refid="Base_Column_List" />from t_userwhere id = #{id,jdbcType=VARCHAR}</select><delete id="deleteByPrimaryKey" parameterType="java.lang.String" >delete from t_userwhere id = #{id,jdbcType=VARCHAR}</delete><insert id="insert" parameterType="com.luonan.domain.User" >insert into t_user (id, user_name, password, phone, role_id)values (#{id,jdbcType=VARCHAR}, #{userName,jdbcType=VARCHAR}, #{password,jdbcType=VARCHAR}, #{phone,jdbcType=VARCHAR}, #{roleId,jdbcType=VARCHAR})</insert><insert id="insertSelective" parameterType="com.luonan.domain.User" >insert into t_user<trim prefix="(" suffix=")" suffixOverrides="," ><if test="id != null" >id,</if><if test="userName != null" >user_name,</if><if test="password != null" >password,</if><if test="phone != null" >phone,</if><if test="roleId != null" >role_id,</if></trim><trim prefix="values (" suffix=")" suffixOverrides="," ><if test="id != null" >#{id,jdbcType=VARCHAR},</if><if test="userName != null" >#{userName,jdbcType=VARCHAR},</if><if test="password != null" >#{password,jdbcType=VARCHAR},</if><if test="phone != null" >#{phone,jdbcType=VARCHAR},</if><if test="roleId != null" >#{roleId,jdbcType=VARCHAR},</if></trim></insert><update id="updateByPrimaryKeySelective" parameterType="com.luonan.domain.User" >update t_user<set ><if test="userName != null" >user_name = #{userName,jdbcType=VARCHAR},</if><if test="password != null" >password = #{password,jdbcType=VARCHAR},</if><if test="phone != null" >phone = #{phone,jdbcType=VARCHAR},</if><if test="roleId != null" >role_id = #{roleId,jdbcType=VARCHAR},</if></set>where id = #{id,jdbcType=VARCHAR}</update><update id="updateByPrimaryKey" parameterType="com.luonan.domain.User" >update t_userset user_name = #{userName,jdbcType=VARCHAR},password = #{password,jdbcType=VARCHAR},phone = #{phone,jdbcType=VARCHAR},role_id = #{roleId,jdbcType=VARCHAR}where id = #{id,jdbcType=VARCHAR}</update>
</mapper>

<2>下面介绍特殊的查询语法，连接查询

a) userMapper.java

package com.luonan.mapper;import com.luonan.domain.User;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Param;import java.util.List;
import java.util.Map;public interface UserMapper {//通过实体入参，返回实体对象List<User> findUserAndProjectByUser(User user);//通过实体入参，返回实体对象List<User> findUserAndRoleByUser(User user);//通过非同一个实体的多个参数进行入参，返回Map对象List<Map<String,Object>> findUserAndRole(@Param("userId") String userId,@Param("userName") String userName,@Param("roleName") String roleName);
}

b）UserMapper.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
<mapper namespace="com.luonan.mapper.UserMapper" ><!--第一组==============================================--><resultMap id="userAndProjectMap" type="User"><id column="id" jdbcType="VARCHAR" property="id" /><result column="user_name" jdbcType="VARCHAR" property="userName" /><result column="password" jdbcType="VARCHAR" property="password" /><result column="phone" jdbcType="VARCHAR" property="phone" /><result column="role_id" jdbcType="VARCHAR" property="roleId" /><collection ofType="Project" property="projectList"> <!--User实体需要改造--><id column="projectId" jdbcType="VARCHAR" property="id" /><result column="project_name" jdbcType="VARCHAR" property="projectName" /><result column="user_id" jdbcType="VARCHAR" property="userId" /><result column="content" jdbcType="VARCHAR" property="content" /></collection></resultMap><select id="findUserAndProjectByUser" parameterType="User" resultMap="userAndProjectMap" > /*resultType="java.util.Map" 返回Map*/SELECTu.*,p.content,p.id projectId,p.project_name,p.user_idFROM`t_user` uINNER JOIN t_project p ON u.id = p.user_idWHERE 1=1<if test="id != null">AND u.id = #{id,jdbcType=VARCHAR}</if><if test="userName != null">AND u.user_name = #{userName,jdbcType=VARCHAR}</if></select><!--第二组============================================================--><resultMap id="userAndRole" type="User"><id column="id" jdbcType="VARCHAR" property="id" /><result column="user_name" jdbcType="VARCHAR" property="userName" /><result column="password" jdbcType="VARCHAR" property="password" /><result column="phone" jdbcType="VARCHAR" property="phone" /><result column="role_id" jdbcType="VARCHAR" property="roleId" /><association javaType="Role" property="role">  <!--User实体需要改造--><result column="name" jdbcType="VARCHAR" property="name" /></association></resultMap><select id="findUserAndRoleByUser" parameterType="User" resultMap="userAndRole" > <!--resultType="java.util.Map" 返回Map-->SELECTu.*,r.nameFROM`t_user` uINNER JOIN t_role r ON u.role_id = r.idWHERE 1=1<if test="id != null">AND u.id = #{id,jdbcType=VARCHAR}</if><if test="userName != null">AND u.user_name = #{userName,jdbcType=VARCHAR}</if></select><!--第三组==================================================--><!--传入参数有user和role的；动态写法--><!--方式一 用where 和  if 注意点 语句中的where 省略不写  都要加and 会智能去掉where后面的and，但是不加and 不会智能添加and 所以都加and --><!--<select id="findUserAndRole" resultType="java.util.Map">SELECTu.*,r.nameFROM`t_user` uINNER JOIN t_role r ON u.role_id = r.id<where><if test="userId != null">AND u.id = #{userId,jdbcType=VARCHAR}</if><if test="userName != null">AND u.user_name LIKE CONCAT('%',#{userName,jdbcType=VARCHAR},'%')</if><if test="roleName != null">AND r.name LIKE CONCAT('%',#{roleName,jdbcType=VARCHAR},'%')</if></where></select>--><!--方式二 trim prefix="where" 开头加where prefixOverrides="and | or"自动去掉开头的and或者or--><!-- prefixOverrides-前缀覆盖；suffixOverrides-后缀覆盖 --><select id="findUserAndRole" resultType="java.util.Map"> <!--直接返回Map实体，不用改造实体，用原始的就行-->SELECTu.*,r.nameFROM`t_user` uINNER JOIN t_role r ON u.role_id = r.id<trim prefix="WHERE" prefixOverrides="AND | OR"><if test="userId != null">AND u.id = #{userId,jdbcType=VARCHAR}</if><if test="userName != null">AND u.user_name LIKE CONCAT('%',#{userName,jdbcType=VARCHAR},'%')</if><if test="roleName != null">AND r.name LIKE CONCAT('%',#{roleName,jdbcType=VARCHAR},'%')</if></trim></select>
</mapper>

改造后的User实体

package com.luonan.domain;import java.util.List;public class User {private String id;private String userName;private String password;private String phone;private String roleId;private List<Project> projectList; //新加入的 一对多private Role role; //新加入的 一对一public List<Project> getProjectList() {return projectList;}public void setProjectList(List<Project> projectList) {this.projectList = projectList;}public Role getRole() {return role;}public void setRole(Role role) {this.role = role;}public String getId() {return id;}public void setId(String id) {this.id = id == null ? null : id.trim();}public String getUserName() {return userName;}public void setUserName(String userName) {this.userName = userName == null ? null : userName.trim();}public String getPassword() {return password;}public void setPassword(String password) {this.password = password == null ? null : password.trim();}public String getPhone() {return phone;}public void setPhone(String phone) {this.phone = phone == null ? null : phone.trim();}public String getRoleId() {return roleId;}public void setRoleId(String roleId) {this.roleId = roleId == null ? null : roleId.trim();}
}

注意：用实体返回的结果和用Map返回的结果不同，实体更加清晰，Map的简单方便

a) List<User> findUserAndProjectByUser(User user);用实体返回

[{"id": "1","userName": "张三","password": "123","phone": "123123","roleId": "1","projectList": [{"id": "1","projectName": "电影","userId": "1","content": "红海行动"},{"id": "2","projectName": "新时代 新气象","userId": "1","content": "千万工程”造就万千美丽乡村"},{"id": "3","projectName": "农业农村部","userId": "1","content": "新一轮农业农村投资高潮或开启"},{"id": "4","projectName": "农业中央纪委","userId": "1","content": "集中整治“不吃公款吃老板”等不正之风部"},{"id": "5","projectName": "今年养老金调整进入落地期","userId": "1","content": "上海已出台调整方案"}],"role": null}
]

b) List<User> findUserAndRoleByUser(User user);用实体返回

[{"id": "1","userName": "张三","password": "123","phone": "123123","roleId": "1","projectList": null,"role": {"id": null,"name": "董事长"}},{"id": "4","userName": "张三","password": "1","phone": "1","roleId": "2","projectList": null,"role": {"id": null,"name": "部门经理"}}
]

c) List<Map<String,Object>> findUserAndRole( @Param ( "userId" ) String userId, @Param ( "userName" ) String userName, @Param ( "roleName" ) String roleName);

用Map返回

[{"password": "123","phone": "123123","role_id": "1","user_name": "张三","name": "董事长","id": "1"},{"password": "123","phone": "11","role_id": "2","user_name": "李四","name": "部门经理","id": "2"},{"password": "123","phone": "111","role_id": "3","user_name": "王五","name": "员工","id": "3"},{"password": "1","phone": "1","role_id": "2","user_name": "张三","name": "部门经理","id": "4"}
]

10、Controller层

package com.luonan.controller;import com.luonan.domain.Project;
import com.luonan.domain.User;
import com.luonan.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;/*** Created by Administrator on 2018/4/24.*/
@RestController
public class Controller {private final UserService userService;@Autowiredpublic Controller(UserService userService) {this.userService = userService;}@RequestMapping(value = "/add/user")public Object addUser(String id, String userName, String passWord, String phone) {User user = new User();user.setPassword(passWord);user.setPhone(phone);user.setId(id);user.setUserName(userName);return userService.addUser(user);}@RequestMapping(value = "/add/project")public Object addProject(String id, String projectName, String userId, String content) {Project project = new Project();project.setContent(content);project.setId(id);project.setProjectName(projectName);project.setUserId(userId);return userService.addProject(project);}@RequestMapping(value = "/update/user")public Object updateUser(String id, String userName, String passWord, String phone) {User user = new User();user.setPassword(passWord);user.setPhone(phone);user.setId(id);user.setUserName(userName);return userService.updateUser(user);}@RequestMapping(value = "/find/user")public Object findUserById(String userId) {return userService.findUserById(userId);}@RequestMapping(value = "/find/user-project")public Object findUserAndProjectByUser(String userId, String userName) {User user = new User();user.setId(userId);user.setUserName(userName);return userService.findUserAndProjectByUser(user);}@RequestMapping(value = "/find/user-role")public Object findUserAndRoleByUser(String userId, String userName) {User user = new User();user.setId(userId);user.setUserName(userName);return userService.findUserAndRoleByUser(user);}// 联合查询+多个参数+分页@RequestMapping(value = "/find/user-role-by")public Object findUserAndRole(String userId, String userName, String roleName, int pageNum, int pageSize) {return userService.findUserAndRole(userId, userName, roleName, pageNum, pageSize);}
}

12、service层

<1>UserService.java

package com.luonan.service;import com.luonan.domain.Project;
import com.luonan.domain.User;import java.util.List;
import java.util.Map;/*** Created by Administrator on 2018/4/24.*/
public interface UserService {/*** 添加用户** @param user* @return*/int addUser(User user);/*** 添加项目** @param project* @return*/int addProject(Project project);/*** 修改用户** @param user* @return*/int updateUser(User user);/*** 修改项目** @param project* @return*/int updateProject(Project project);/*** 根据userId查询用户** @param userId* @return*/User findUserById(String userId);/*** 联合查询User和Project** @param user* @return*/List<User> findUserAndProjectByUser(User user);/*** 联合查询User和Role** @param user* @return*/List<User> findUserAndRoleByUser(User user);/*** 联合查询User和Role** @return*/List<Map<String, Object>> findUserAndRole(String userId, String userName, String roleName, int pageNum, int pageSize);}

<2>UserServiceImpl.java

package com.luonan.service;import com.github.pagehelper.PageHelper;
import com.luonan.domain.Project;
import com.luonan.domain.User;
import com.luonan.mapper.ProjectMapper;
import com.luonan.mapper.UserMapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;import java.util.List;
import java.util.Map;/*** Created by Administrator on 2018/4/24.*/@Service
public class UserServiceImpl implements UserService {private final UserMapper userMapper;private final ProjectMapper projectMapper;@Autowiredpublic UserServiceImpl(UserMapper userMapper, ProjectMapper projectMapper) {this.userMapper = userMapper;this.projectMapper = projectMapper;}@Overridepublic int addUser(User user) {return userMapper.insertSelective(user);}@Overridepublic int addProject(Project project) {return projectMapper.insertSelective(project);}@Overridepublic int updateUser(User user) {return userMapper.updateByPrimaryKeySelective(user);}@Overridepublic int updateProject(Project project) {return projectMapper.updateByPrimaryKeySelective(project);}@Overridepublic User findUserById(String userId) {return userMapper.selectByPrimaryKey(userId);}@Overridepublic List<User> findUserAndProjectByUser(User user) {return userMapper.findUserAndProjectByUser(user);}@Overridepublic List<User> findUserAndRoleByUser(User user) {return userMapper.findUserAndRoleByUser(user);}@Overridepublic List<Map<String, Object>> findUserAndRole(String userId, String userName, String roleName, int pageNum, int pageSize) {PageHelper.startPage(pageNum, pageSize); //使用分页插件分页return userMapper.findUserAndRole(userId, userName, roleName);}
}

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Spring boot整合mybatis详细